irTis BenchTop 2K, 4K and 6
Basic Operation
Rev 007, 10/11 23
© SP Scientific 2011
Preventing Glassware Breakage
Avoid cleaning glassware with a wire brush as metal-to-glass abrasion
creates microscopic scratches which can cause breakage.
Never fill a flask to more than half of its total capacity (e.g., a 600 mL flask
has a working capacity of 300 mL).
When pre-freezing samples in a storage freezer, tilt glassware at a 30° to 45°
angle to increase surface area and reduce stress on the glass.
To prevent glass-to-glass abrasion when placing flasks in glassware washers,
do not allow contact with metal racks or other glassware.
Product Dryness End Point
Because the glassware is exposed to the open air during manifold drying, you can
clearly observe drying rates. However, this exposure to ambient temperatures may
cause environmental moisture to condense and freeze on the cold outer surface of the
flask. This is normal.
As the product ice inside the glassware gradually sublimes, the frost on the outside of
the glassware slowly recedes and eventually disappears. When glassware becomes
completely free of exterior frost, approximately 98% of moisture has been removed
from the product. You can assume drying is complete (i.e., <1% moisture content)
when the exterior of the glassware is at room temperature.
Stoppering (Optional)
The stoppering option applies pressure to partially-inserted stoppers, forcing them into
the vials while sealing the product under system vacuum. Stoppering can be operated
at atmospheric pressure or under vacuum. Stoppering must be performed with evenly
distributed vials of equal height to ensure uniform stoppering force distribution and
prevent vial shifting.
Stopper vials only after:
The product is fully dried.
The vacuum system is turned off.
The shelf heat control is disabled.
Note: SP Scientific recommends performing a test run to ensure that you are familiar with the
stoppering process before adding your product.
The optional stoppering system includes a manual stoppering mechanism, and comes
with either heated or unheated shelves. For more information, see Chapter 7: Optional
Components.
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